Thermally activated upconversion luminescence and ratiometric temperature sensing under 1064 nm/808 nm excitation

Yanxing Wang; Wenjing Li; Yaqun Ma; Bo Hu; Xueli Chen; Ruichan Lv

doi:10.1088/1361-6528/acc037

Thermally activated upconversion luminescence and ratiometric temperature sensing under 1064 nm/808 nm excitation

Nanotechnology. 2023 Mar 20;34(23). doi: 10.1088/1361-6528/acc037.

Authors

Yanxing Wang¹, Wenjing Li¹, Yaqun Ma¹, Bo Hu¹, Xueli Chen¹, Ruichan Lv¹

Affiliation

¹ Engineering Research Center of Molecular and Neuro Imaging, Ministry of Education, School of Life Science and Technology, Xidian University, Xi'an, Shanxi 710071, People's Republic of China.

PMID: 36857764
DOI: 10.1088/1361-6528/acc037

Abstract

In this research, a thermally activated upconversion luminescence (UCL) probe with ratiometric temperature sensing under 1064 nm and 808 nm excitation was designed. Especially, Nd³⁺, Tm³⁺and Ce³⁺were doped in rare earth nanoparticles (RENPs) as UCL modulators. By optimizing the elements and ratios, the excitation wavelength is successfully modulated to 1064 nm excitation with UCL intensity enhanced. Additionally, the prepared RENPs have a significant temperature response at 1064 nm excitation and can be used for thermochromic coatings. The intensity ratio of three-photon UCL (1064 nm excitation) to two-photon UCL (808 nm excitation) as an exponential function of temperature can be used as a ratiometric temperature detector. Therefore, this designed thermochromic coatings may enable new applications in optoelectronic device and industrial sensor.

Keywords: ratiometric probe; temperature sensing; thermochromic; upconversion luminescence.